US2987449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enhancement of 7-chlorotetracycline production
Assignee: Wyeth Holdings LLC
•
Filing: 1960-02-23
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Granted: 1961-06-06
•
Expires: 1980-02-23
Abstract
No abstract record available.
Inventors
- 👤 Miller Philip Andrew
- 👤 Goodman Joseph Jacob
- 👤 Sjolander Newell Oscar
- 👤 Mccormick Jerry Robert Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:16
CPC Classifications
C; C12; C12P; C12P29/00; C07; C07C; C07C233/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/886; Y10S435/889
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
IN A PROCESS FOR THE PRODUCTION OF 7-CHLOROTETRACYCLINE WHEREIN A 7-CHLORO-5A(11A)-DEHYDROTETRACYCLINEPRODUCING STRAIN OF STREPTOMYCES AUREOFACIENS SELECTED FROM THE GROUP CONSISTING OF STRAINS ATCC 12748, ATCC 12749, ATCC 12750 AND ATCC 12751 IS CULTIVATED IN AN AQUEOUS NUTRIENT MEDIUM, THE IMPROVEMENT WHICH COMPRISES GROWING SAID ORGANISM IN SAID MEDIUM IN THE PRESENCE OF A LOWER ALKANOL HAVING LESS THAN 6 CARBON ATOMS UNTIL SUBSTANTIAL ANTIBACTERIAL ACTIVITY IS IMPARTED THERETO.
Claim 2
Dependent Claim
68 words
IN A PROCESS FOR THE PRODUCTION OF 7-CHLOROTETRACYCLINE WHEREIN A 7-CHLORO-5A(11A)-DEHYDROTETRACYCLINEPRODUCING STRAIN OF STREPTOMYCES AUREOFACIENS SELECTED FROM THE GROUP CONSISTING OF STRAINS ATCC 12748, ATCC 12749, ATCC 12750 AND ATCC 12751 IS CULTIVATED IN AN AQUEOUS NUTRIENT MEDIUM, THE IMPROVEMENT WHICH COMPRISES GROWING SAID ORGANISM IN SAID MEDIUM IN THE PRESENCE OF A LOWER ALKANOL HAVING LESS THAN 6 CARBON ATOMS UNTIL SUBSTANTIAL ANTIBACTERIAL ACTIVITY IS IMPARTED THERETO.
References Cited (Backward Citations)
US2709672A
Cited
US2739924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |